|Publication number||US4905508 A|
|Application number||US 07/309,351|
|Publication date||Mar 6, 1990|
|Filing date||Mar 9, 1989|
|Priority date||Mar 9, 1989|
|Also published as||DE4006875A1|
|Publication number||07309351, 309351, US 4905508 A, US 4905508A, US-A-4905508, US4905508 A, US4905508A|
|Inventors||David L. LeRette|
|Original Assignee||Thomas A. Ramona|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (10), Classifications (11), Legal Events (8)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention generally relates to radiator hose hydrometers and more particularly to an improved hydrometer which permits safe, rapid and accurate analysis of specific gravity, level and condition of engine coolant.
As is well-known, a liquid-cooled engine can be severely damaged if the cooling system fails to function properly. The effectiveness of the cooling system is largely determined by the amount of coolant in the system, as well as the amount of contamination of the liquid coolant and whether the coolant is circulating within the system. Typically, the coolant's level, color and clarity is visually inspected by removing the radiator cap and observing the coolant therein. While the coolant's level can be readily determined, the accuracy of such a visual inspection with regards to color and clarity is less than desirable. Further, the specific gravity of the coolant cannot be determined without the aid of a hydrometer. The inability to immediately determine the coolant's specific gravity by cursory inspection is a serious drawback, since the coolant's specific gravity determines the freezing point of the coolant.
Visual inspection of the coolant by removal of the radiator cap has other drawbacks as well. There is a risk of serious burns, which can occur if the radiator cap is removed from a hot engine. Secondly, this method does not encourage one to frequently inspect the coolant, since the radiator cap must be removed and a hydrometer purchased. Furthermore, this method does not permit the determination of whether the coolant is flowing or is blocked.
While there are several United States patents directed to devices interposed in radiator hoses to allow determination of the coolant level, they do not permit the user to determine the coolant's specific gravity. Furthermore, they are designed for a single, specific diameter radiator hose. Thus, manufacturers and distributors must stock a large inventory of various sizes and parts for consumers. Additionally, such devices will give inaccurate readings as to the coolant's level in those instances where the radiator hose and prior art device is inclined.
It is therefore a principal object of the present invention to provide a radiator hose hydrometer which permits rapid, safe and accurate analysis of the engine coolant.
Another object of the present invention is to provide a radiator hose hydrometer which permits easy and rapid determination of the radiator fluid's specific gravity.
A further object of the instant invention is to provide a radiator hose hydrometer which permits a visual determination as to the coolant's level, clarity, contamination and coolant flow.
Still another object of the invention is to provide a radiator hose hydrometer which allows visual inspection of the engine coolant's specific gravity, color, fluid level, clarity and coolant flow without having to remove the radiator cap.
An additional object of the present invention is to provide a radiator hose hydrometer which can be leveled within an inclined radiator hose.
Yet a further object is to provide a radiator hose hydrometer which may be utilized with radiator hoses having different diameters.
These and other objects of the present invention will be apparent to those skilled in the art.
The radiator hose hydrometer of this invention is mounted in a substantially horizontally disposed transparent tubular conduit interposed in the upper radiator hose of a liquid cooled engine. The transparent tubular conduit permits visual inspection of the coolant passing therethrough.
A hydrometer is mounted within the tubular conduit and is comprised of a series of arcuate transparent tubular members having apertures therethrough permitting the free flow of coolant into the tubular member. A float is operably secured within each tubular member, and is formed from a material which will float in liquid of a predetermined specific gravity. Each float is formed from material of various specific gravities, so that the specific gravity of the coolant can be determined by the specific float or floats which float in the coolant. Printed indicia on the conduit permits determination of the coolant's specific gravity. Additional printed indicia on the transparent tubular conduit permits determination of the coolant's level.
Offset adapters are secured to the ends of the tubular conduit permitting the tubular conduit to be interposed in an upper radiator having an inner diameter different than the tubular conduit. A second embodiment of the offset adapter permits the additional function of leveling the tubular conduit.
FIG. 1 is a perspective view of the present invention installed in the upper radiator hose of a liquid cooled internal combustion engine;
FIG. 2 is a perspective view of the invention having an offset adaptor removed from one end thereof;
FIG. 3 is a side elevational view of the invention with portions in sectional view showing connection to the radiator hose;
FIG. 4 is a cross-sectional view of the present invention;
FIG. 5 is a perspective view of the hydrometer of the present invention; and
FIG. 6 is a perspective view of a hydrometer of the present invention having a second embodiment of an offset adapter secured to the ends thereof.
Referring now to the drawings, in which identical or corresponding parts are identified by the same reference numeral, the radiator hose hydrometer of this invention is designated generally at 10. As seen in FIG. 1, the radiator hose hydrometer 10 is interposed in an upper radiator hose 14 connecting a liquid cooled internal combustion engine 12 and a radiator 16. The radiator hose hydrometer 10 is located such that it is substantially horizontal.
As seen in FIG. 2, the radiator hose hydrometer 10 is comprised of a transparent tubular conduit 18 having a first end 20 and second end 22. A roughened area 24 is formed on the exterior of first end 20 and second end 22 and extends circumferentially around conduit 18 which grips the interior surface of the adjacent radiator hose to firmly mount conduit 18 in position.
An offset adaptor 26 is secured to conduit ends 20 and 22 permitting the radiator hose hydrometer lo to be utilized with various diameters of radiator hoses. Offset adapter 26 is utilized in those cases where conduit 18 is interposed in a substantially horizontal section of upper radiator hose 14.
A plurality of arcuate transparent tubular members 28, 30, 32, 34, 36 and 38 are mounted generally vertically along the interior wall of conduit 18 and have plastic floats 40, 42, 44, 46, 48 and 50 operably mounted therein, as indicated in FIG. 2. The plastic floats 40, 42, 44, 46, 48 and 50 are formed of a material which will float in liquid coolant of a predetermined specific gravity. Printed indicia 52 on a strip 53 on conduit 18 assists the user in determining the specific gravity of the floats, and thus, the specific gravity of the coolant.
As seen in FIG. 3, the radiator hose hydrometer has a liquid coolant 56 passing therethrough and floats, 40, 42, 44, 46, 48 and 50 indicate that this specific coolant is safe to a level of negative 10° F. This result is derived from observing the fact that floats 40, 42 and 44 are not floating, and are aligned with printed indicia 52 on strip 53 so as to enable a person to view the indicia. The transparent nature of conduit 18 permits the visual inspection of the color and clarity of coolant 56. Additionally, the flow of the coolant 56 passing therethrough can be readily observed -- which provides a rapid means for determining if the thermostat is stuck. Thus, the conduit 18 provides yet another safety factor. The location of strip 53 additionally permits the user to establish whether the coolant level within conduit 18 is of a sufficient level. As illustrated in FIG. 4, coolant 56 is at a level that is below the upper edge of the strip 53, thus indicating that the coolant level is not sufficient.
Apertures 58 and 60 are formed in tubular member 34 to permit the free flow of liquid coolant therethrough. Each of the tubular members 28, 30, 32, 34, 36 and 38 have apertures therein which permit the free flow of coolant therein. Float 46, as illustrated in FIG. 5, is oriented in tubular member 34 to move vertically within the confines of the tubular member 34, in response to the specific gravity of coolant therein. The ends of tubular member 34 are constricted to restrain the float within the confines of the tubular member.
A second embodiment of the offset adapter is illustrated in FIG. 6, and is utilized in those instances where the upper radiator hose 14 has no substantially horizontal segment into which conduit 18 may be interposed. Offset adapter 26' is secured to the first end 20 and offset adapter 26" is secured to second end 22. Offset adapter 26' has a bore 27 extending therethrough with longitudinal axis of bore 27 being offset from the longitudinal axis of conduit 18. Offset adapter 26" has a bore 27 extending therethrough with longitudinal axis of bore 27' being offset from the longitudinal axis of conduit 18. Offset adapter 26' is secured to conduit 18 such that the longitudinal axis of bore 27 and longitudinal axis bore 27' are opposite of each other. Thus, by rotating conduit 18 about its longitudinal axis, first end 22 will move upwardly and second end 24 will move downwardly. Thus, conduit 18 can be leveled and the level of coolant 56 can accurately be determined.
It can thus be seen that the above mentioned invention accomplishes at least all of its stated objectives.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1578193 *||Sep 3, 1920||Mar 23, 1926||Drake Clarke S||Engine-cooling indicator|
|US1760937 *||Aug 24, 1928||Jun 3, 1930||Carl W Dietrich||Storage-battery indicator|
|US2002183 *||Feb 6, 1930||May 21, 1935||Albert G Mccaleb||Combination thermometer and hydrometer|
|US2212809 *||Mar 4, 1937||Aug 27, 1940||Edelmann & Co||Antifreeze solution indicator|
|US3054391 *||Jan 16, 1961||Sep 18, 1962||Rocklen Inc||Condition indicator of an automotive cooling system|
|US3096748 *||Nov 9, 1961||Jul 9, 1963||Gen Motors Corp||Level indicator and filling device in an engine cooling system|
|US3292427 *||Oct 12, 1964||Dec 20, 1966||Mattson Walfred S||Analysis apparatus|
|US3908467 *||Nov 23, 1973||Sep 30, 1975||Basf Ag||Density measuring apparatus, with plurality of pivoted float indicators of differing buoyancies|
|US4682493 *||Aug 1, 1986||Jul 28, 1987||Dakten Products Corp.||Cooling system monitor|
|US4736628 *||May 27, 1987||Apr 12, 1988||Lin Victoria S||Testing device for car battery and radiator|
|U.S. Classification||73/114.68, 73/445|
|International Classification||G01N9/18, G01N9/14, F01P11/14|
|Cooperative Classification||G01N9/14, F01P11/14, G01N9/18|
|European Classification||G01N9/14, F01P11/14, G01N9/18|
|Mar 20, 1989||AS||Assignment|
Owner name: RAMONA, THOMAS A., NEBRASKA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:LERETTE, DAVID L.;REEL/FRAME:005091/0320
Effective date: 19890206
|Aug 27, 1993||FPAY||Fee payment|
Year of fee payment: 4
|Oct 14, 1997||REMI||Maintenance fee reminder mailed|
|Mar 6, 1998||SULP||Surcharge for late payment|
|Mar 6, 1998||FPAY||Fee payment|
Year of fee payment: 8
|Sep 25, 2001||REMI||Maintenance fee reminder mailed|
|Mar 6, 2002||LAPS||Lapse for failure to pay maintenance fees|
|Apr 30, 2002||FP||Expired due to failure to pay maintenance fee|
Effective date: 20020306